DM74LS125AN ,Quad 3-STATE BufferNational
Semiconductor
64LtM25A/DM54LS12tiA/DM74LtM25A
Quad TRI-STATE® Buffers
DM74LS125ASJ ,Quad 3-STATE BufferGeneral DescriptionThis device contains four independent gates each of whichperforms a non-invertin ..
DM74LS125ASJ ,Quad 3-STATE BufferDM74LS125A Quad 3-STATE BufferAugust 1986Revised March 2000DM74LS125AQuad 3-STATE Buffer
DM74LS126AM ,7 V, quad TRI-STATE bufferGeneral Description
This device contains four independent gates each of which
performs a non-in ..
DM74LS126AM ,7 V, quad TRI-STATE bufferL6126A
National
Semiconductor
54LS126/DM74LS126A Quad TRI-STATE® Buffers
DM74LS126AMX , Quad 3-STATE BufferGeneral DescriptionThis device contains four independent gates each of whichperforms a non-invertin ..
DS21448L ,3.3V E1/T1/J1 Quad Line Interfaceapplications). Intel or Motorola Detects/Generates Blue (AIS) Alarms The DS21448 has diagnostic ..
DS21448L+ ,3.3V E1/T1/J1 Quad Line InterfacePIN DESCRIPTION .....7 3. DETAILED DESCRIPTION 13 3.1 DS21448 AND DS21Q348 DIFFERENCES.....13 4. PO ..
DS21448L+W ,3.3V E1/T1/J1 Quad Line InterfaceAPPLICATIONS CSU Line Build-Outs for T1 Integrated Multiservice Access Platforms AMI, HDB3, and B ..
DS21448LN ,3.3V E1/T1/J1 Quad Line InterfaceBlock Diagram.. 5 Figure 1-2. Receive Logic Detail.. 6 Figure 1-3. Transmit Logic Detail. 6 Figure ..
DS21448LN ,3.3V E1/T1/J1 Quad Line InterfacePIN DESCRIPTION .. 7 3. DETAILED DESCRIPTION........13 3.1 DS21448 AND DS21Q348 DIFFERENCES ...13 4 ..
DS21448LN+ ,3.3V E1/T1/J1 Quad Line InterfaceFEATURES The DS21448 is a quad-port E1 or T1 line interface Four Complete E1, T1, or J1 LIUs unit ..
DM54LS125AJ-DM74LS125AM-DM74LS125AN
7 V, quad TRI-STATE buffer
gil Natiqnal
t Semiconductor
54LS125A/DM54LS125A/DM74LS125A
Quad TRl-STATE® Buffers
General Description
This device contains four independent gates each of which
performs a non-inverting buffer function. The outputs have
the TRl-STATE feature. When enabled. the outputs exhibit
the low impedance characteristics of a standard LS output
with additional drive capability to permit the driving of bus
lines without external resistors. When disabled, both the
output transistors are turned off presenting a high-imped-
ance state to the bus line. Thus the output will act neither as
a significant load nor as a driver. To minimize the possibility
that two outputs will attempt to take a common bus to oppo-
site logic levels, the disable time is shorter than the enable
time of the outputs.
Features
a Alternate Military/Aerospace device (54LS125) is avail-
able. Contact a National Semiconductor Sales Office/
Distributor for specifications.
Connection Diagram
DuaI-ln-Llne Package
Vcc ca A4
114 " l"
I11 10
CI A1 YI
C2 A2 " GND
TLfF/6387-1
Order Number 54LS125ADMOB. 54LS125AFMt2B, 54LSt25ALMttB,
DM54LS125AJ, DM54LS125AW, DM74LS125AM or DM74LS125AN
See NB Package Number E20A, J14A, M14A, N14A or W143
Function Table
Inputs Output
x H Hi-Z
H = High Logic Level
L = Low Logic Level
X '" Either Low or High Logic Level
Hi-Z = TRI-STATE (Outputs are disabled)
V93 lS'I
LS125A
Absolute Maximum Ratings (Note)
" MllitarylAerospace specified devices are required,
please contact the National Semiconductor Sales
0tfleefDlstrlttutors for availability and specltlcations.
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range
DM54LS and 54LS - 55°C to + 125''C
Note: The "Absolute Maximum Ratings" are those values
beyond which the safety of the device cannot be guaran-
teed. The de vice should not be operated at these limits. The
parametric values defined in the "Electrical Characteristics"
table are not guaranteed at the absolute maximum ratings.
The "Recommended Operating Conditions" table will deftnty
the conditions for actual device operation.
DM74LS
Storage Temperature Range
tPC to + 70'C
-65'C to +150°C
Recommended Operating Conditions
Symbol Parameter DM54LS125A DM74LS125A U nl ts
Min Nam Max Min Nom Max
Vcc Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
VIH High Level Input Voltage 2 2 V
VIL Low Level Input Voltage 0.7 0.8 V
10H High Level Output Current - 1 -2.6 mA
IOL Low Level Output Current 12 24 mA
TA Free Air Operating Temperature - 55 125 0 70 "C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Mln (N ate I) Max Units
VI Input Clamp Voltage Vcc = Min, II = --18 mA - 1.5 V
VOH High Level Output Vcc = Min, IOH --.. Max 2 4 3 4 V
Voltage Ihr. = Max,Ve = Min _ .
VOL Low Level Output VCC = Min, IOL = Max DM54 0.25 0.4
Voltage VIL = Max DM74 0.35 0.5 v
IOL = 12 mA, Vcc = Min DM74 0.25 0.4
1. Input Current @ Max Vcc = Max, V. = 7V 0.1 mA
Input Voltage
IIH High Level Input Vcc = Max, VI = 2.7V 20 PSA
Current
IIL Low Level Input VCC = Max, VI = 0.4V -0.4 m A
Current
IOZH Off-State OutputCurrent VCC = Max, Vo = 2.4V
with High Level Output " = Min, V.L = Max 20 PA
Voltage Applied
IOZL Off-State Output Current Vcc = Max, Vo = 0.4V
with Low Level Output VIH = Min, " = Max -20 MA
Voltage Applied
log Short Circuit Vcc = Max DM54 -20 - 1 00 mA
Output Current (Note 2) DM74 _ 20 _ 100
Itttt Supply Current VCC = Max (Note 3) 11 20 mA
Note 1: All typicals are at Vcc = 5V, TA = 25''C.
Note 2: Not more than one output should be shorted at a time. and the duration should not exceed one second.
Note & '00 is measured with the data control (C) inputs at 4.5V and the data inputs grounded.
Switching Characteristics at VCC == 5V and TA = 25''C (See Section 1 forTest Waveforms and Output Load)
RL = 667ft
Symbol Parameter CL = 50 pF th. = 150 pF Units
Min Max Min Max
tPLH Propagation Delay Time Low 15 21 ns
to High Level Output
tPHL Propagation Delay Time High
to Low Level Output 18 22 ns
tsz Output Enable Time to
High Level Output 25 35 ns
tPZL Output Enable Time to
Low Level Output 25 40 ns
tsz Output Disable Time from 20 ns
High Level Output (Note 1)
1.2.; Output Disable Time from 20 ns
Low Levei Output (Note 1)
Note 1: CL = SpF.
VEZ l-S'l
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Datasheets for electronic components.
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This file is the datasheet for the following electronic components:
DM74LS125AN - product/dm74ls125an?HQS=T|-nu|I-nulI-dscataIog-df-pf-null-wwe
54LS125ADMQB - productl54ls125aqub?HQS=T|-nu|I-nu|I-dscatalog-df—pf—nulI-wwe
DM74LS125AM - product/dm74ls125am?HQS=T|—nu|I-null-dscataIog-df—pf-null-wwe
DM54LS125AW - product/dm54ls125aw?HQS=T|—nu|I-null-dscataIog-df-pf-null-wwe
DM54LS125AJ - product/dm54ls125aj?HQS=T|-nu|I-null-dscatalog-df-pf-null-wwe
54LS125AFMQB - product/54Is125afmqb?HQS=T|-nulI-nulI-dscatalog-df—pf—null-wwe
54LS125ALMQB - product/54Is125almqb?HQS=T|—nuIl-nu|I-dscataIog-df-pf-null-wwe
